Emergency throttle-valve.



INo. 642357. Patented Jan. 30, 1900. J. n. REYNOLDS.

EMERGENCY THROTTLE VALVE.

- (Application filed July 26, 1898.) (No Model.) 2 Sheets-Sheet I.

Witnesses: Jnven tor.-

No. 642,257. Patented Ian. 30, I900. J. R. REYNOLDS.

EMERGENCY THROTTLE VALVE.

(Application filed July 26, 189B.) (No Model.) 2 Sheets-Sheet 2.

Mm 655 es: In @622 to r:

PATENT OFFICE.

E ERG ENCY TH ROTTLE l/ALVE.

SPEOIFIGATIUN forming part of Letters Patent No. 642,257, dated January 30, 1900. Application filed July 26, 1398. Serial No. 686,920. (No new T on whom it may concern: I

Be it known that I, JOHN R. REYNOLDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Emergency Throttle- Valves, of which .the following is a specification.

This invention relates to an emergency throttle-valve which is actuated by the pressure of the steam in is connected.

The object of the invention is the production of a simple, durable, and reliablesteamactuated valve which when located in a steammain can be set-in operation for throttling the flow of steam through the main to an engine at any time, from points near to or at a distance, by an engineer or operator as the pressure in opposite directionsin the cylini dent in the body in which they are movable,

and a disk that is movable to and from a seat around'the port and is connected with a handspindle. Connected with the body is a'shell containing a chamber with a plunger or similar part that is movable to open or close a passage leading from the chamber to the cylinder back f the larger piston either bynand, by the action of mechanical means upon the release of a trip, or by excess steam-pressure upon either side of the plunger in the chamber that is connected at one end with the steam-supply on oneside of the port and at the other end with the steam-supply on the other side of the port. In the connection leading from one endof the plunger-chamber is a cock that is employed in opening the valve, and connected with the plunger is a weighted lever that is retained in position for operating the plunger by an electric trip.

Figure 1 of the drawings shows a side ole 'vation of the valve with a part of the plungershell broken away and the case of the electric the main with which it erted on both sides of the disk 8.

trip out in section. Fig. 2 shows a view. of. the valve looking from one end. Fig. 3 shows a central horizontal section of the valve'yand Fig. 4 shows a view of the plunger-chamber, the plunger, and the plunger-operatin g levers.

The body 1 of the valve may be cast of any vsuitable metal with flanged or screw-threaded 7 ends for attachment to the pipes of the steammain. In the port through the diaphragm 2 is a seat-ring 3, which in the form shown is faced to provide seats on both sides and is provided with arms that support a guidingarbor 4. A bonnet 5 is secured to one side of the body, and supported-bythis bonnet is a properly-packed threaded spindle 6, that on the exterior is provided with a handle 7 and on'the interior with a disk 8, arranged to close against one of the faces of the seat-ring.- The .disk is preferably loosely connected with the spindle and is guided in its movement by one end of the arbor 4. A small opening 9 may bemade through the disk, so that when the spindle is loosened steam-pressure can be ex- The handthrottle is not essential to the invention and may .or may not be provided for controlling the amount of the flow of steam through the port 01: the emergency-valve.

The stem of the disk 10, that is guided in its movement to and from a seat on the seatring in the port by one end of the arbor 4, is connected with a 'pair of pistons 11 and 12, that are connected and move togetherin cylinders of proper sizein a hub formed on one side of the body. The piston 12 is larger in diameter than the piston 11, and as the space between the pistons is vented to the atmosphere and there never is pressure between them when the passages'are so opened that pressure is exerted upon the opposite faces of the pistons the excess pressure on the larger, due to the larger area, will close the disk 10 against its seat and shut the port. When there is not any pressure upon the larger piston, pressure upon the face of the, disk will cause it to open, and pressure upon the smaller piston after the port is free will cause the disk to remain open until pressure is again admitted to the cylinder containing the larger piston.

. The plunger-shell 13 is shown as mounted directly upon the body; but it may be located connected with the steam-main anywhere behandle 18, by ez-rts which its plug may.

be closed, and spring 19, .wound about the tween the port through the valve a'ndthe boiler. Located in the pipel6-is a cock 1'7. This is desirab" a three-way cock having a spindle, so as to always return the plug to an open position. Two ports 20 and2-l are'mad' from the chamber through the side of the shell, and communicating with'these ports is a pipe 22, that leads to the cylinder containing the larger piston.

In the chamber in the shell 13 isa plunger 23, arranged so that. it willbe subjected to steam-pressure in one direction through the pipe 15 and subjected tosteam-pressure in the opposite direction through the pipe 16. The plunger is soar-ranged that when moved to one limit of its play theport is opened and the port 21 closed, and'whe'n move'd to'.

the other limit the port 20 is c'losed and the port 21 opened. A vent isniade from the chamber in the shell between the'ends of the plunger, and in the valve illustratedthis vent is made through the body into thefspace between the pistons that is vented to the'a't- Held by walls of the shell. is a" mosphere. shaft 24, and projecting from this and engag-n ing the plunger is a rocker-arm 25. Fasteued to the-shaft outside of the shell is 'a lever 26,

and loosely mounted .upon the shatt'at the side of this lever is a lever 27. A pin'28 projectsfrom the lever-26 under the lever 27, so that the former may be moved downwardly freely, but will be carried down by the latter.

A weight 29 is mounted upod'the lever 27, and a rod 30 connectsthis lever'with anelectrictrip-lever 31. This electric trip is of com.- mon construction and the magnet circuitw'ires may be led to any desirable localities in the plant in which the valve is placed.

In-the drawings both the hand-disk and the emergency-disk are shown as closed. When.

connected with a steam-main, in order to open the emergency-valve the cock 17 is turned so as to close the passage through the'pipe 16 and shut 0E the steam-pressure" from the plungerand from the large piston in the body. Then when the hand-disk is opened, if not already open, the steam pressu re in the'main will be exerted upon the emergency-disk and, as there is no pressure upon the larger piston this disk will be forcedopen. After the emergency-disk.is-opened and themain between the valve and-thee'ngine filled with steam pressure will be exerted through-the pipe 15 upon the plunger in such manner as to drive it to the other end of the shell, causing it to close theport 20 and open the port 21. With the port 20 closed the cock may be opened without danger of movingjthe plunger, for the pressure upon its opposite ends will then be equal. When the port 20' is open, the steam-pressure on the larger pistonovercomes the pressure in the body on the smaller piston and on the disk and moves the parts so that the main port will -be-closed. This port 20 is uncovered by the movement of the plunger, which can be accomplished by hand either near to or at a distance from the valve and'will' be accomplished by the-bursting of the steam-main on the outlet side of the valve. If it is desired to close the emergency-disk byhand, the lever 26 may be turned. and the plunger moved so that the port 20 will be uncovered and the pressure of the steam permitted to pass through the pipe 22 to the large piston, which by virtue of its area will cause the emergency-disk to be closed. To close the emergency-disk from a distance, the electric trip is actuated by pressing a button, and the actuating of this trip releases the trip-lever and allows the weight to drop and. turn the levers so as to open the port '20, Should the st eam-m ain between the valve and the. engine burst, so that there will be no pres sure in the pipe 15 and on the end of the plunger adjacent to the end of that pipe, the pressure on the othelend wouldinove the plungerso as to open the port 20 and permit the steam-pressure to passto the larger piston.

I claim as my invention- 1. A throttle-valve having a body'with a port in the interior, a cylinder connected with the body on the outlet side'of the port, a shell mounted upon the cylinder, a passage from the shell to-the inlet side of the port, a pasport, a passage from the shell to the cylinder, a plunger movable within the shell between the passages to the inlet and outlet sides of the port and adapted to be moved across the passage to the cylinder, a disk movable in of different area movable within the cylinder and connected with the disk, and an escapevent from the cylinder between the pistons, substantially as specified.

2. A throttle-valve having a body with a port in the interior, a cylinder connected with the body on the outlet side of the port, a shell mounted upon the cylinder, a passage from the shell to the inlet side of the port, a passage from the shell to the outlet side of the port, a passage from the shell to the cylinder, a plunger movable within the shell between the passages to the inlet and outlet sides. of the port and adapted .to move across the passage to the cylinder, a weighted lever connected with the plunger, a disk movable in the body toward and from the port, pistons of different area movable within the cylinder and connected with the disk, and an escapevent from the cylinder between the pistons, substantially as specified.

3. A throttle-valve having a body with a 5 sage from the-shell to theoutlet sideof the the'body toward and from the port, pistons age port in the interior, a cylinder connected. with the body on the outlet-side of. the port, a shell mounted upon the cylinder, a passage from the shell to the inlet side of the port, a passage from the shell to the outlet side of the port, a'passage from the shell to the cy1inder,a plunger movable within the shell between the passages to the inlet and outlet sides of the port and adapted to move across the passage to the cylinder, a weighted lever connected with the plunger, an electric trip for retaining the lever in operative position, a disk movable in the body toward and from the port, pistons of different area movable within the cylinder and connected with the disk, and an escape-vent from the cylinder between the pistons, substantially as specified.

4. A throttle'valve having a body with a port in the interior, a cylinder connected with the body on the outlet side of the port, a shell mounted upon the cylinder, a passage from the shell to the inlet side of the port, a cock located in the passage to the inlet side of the "port, a passage from the shell to the outlet side of the port, a passage from the shell to the cylinder, a plunger movable'within the shell between the passages to the inlet and outlet sides of the port and adapted to move across the passage to the cylinder, a disk movable in the body toward and from. the port, pistons of different area movable within the cylinder and connected with the disk, and an escape-vent from the cylinder between the pistons, substantially as specified.

5. A throttle-valve! having a body with a port in the interior, a cylinder connected with the body on the outlet side of the port, a shell mounted upon the cylinder, a passage from the shell to the inlet side of the port, a passage from the shell to the outlet side of the port, a passage from the shell to the cylinder, a plunger movable within the shell between the passages to the inlet and outlet sides'of the port and adapted to move across the passage to the eylinder,'a disk movable in the body toward and from the port on the outlet side, pistons of different area movable within the cylinder and connected with the disk, an escapevent from the cylinder between the pistons, a disk movable toward and from the port on the inlet side, and a spindle extending through the body and connected in the interiorwith the disk on the inlet side of the port and having on the outside a handle, substantially as specified.

6. A throttle-valve having a body with a port in the interior, a cylinder connected With the body on the outlet side of the port, a shell mounted upon the cylinder, a passage from the shell to the inlet side of the port, apassage from the shell to the outlet side of the port, a passage from the shell to the cylinder,

a plunger movable within the shell between the passages to the inlet and outlet sides of the port and adapted to move across the peas sage to the cylinder, a disk movable in the body toward and from the port on the outlet side, pistons of different area movable within the cylinder and connected with the disk, an escape-vent from the cylinder between the pistons, a disk movable toward and from the port on the inlet side, a perforation through the latter disk, and a spindle extending through the body and loosely connected in the interior with the latter disk and having on the outside a handle, an .end of the spindle when screwed in stopping the perforation through the hand-disk and when unscrewed opening the perforation through the hand disk, substantially as specified.

J OHN R. REYNOLDS. Witnesses:

H. B. WILLiAMs, E. J. HYDE;- 

